214 Proceedings of the Royal Irish Academji. 



Notices t)/i^Mif^s.— Stella Maris Bay, Howth, East Ireland, at least 10 indi- 

 viduals, of which 3 are perfect. Feorinyeeo Bay, Blaeksod Bay, Station 

 No. W. 116 (10, p. 170), West Ireland, at least 11 individuals, of which 4 are 

 complete. 



Information about Earlier Finds. — Evidently Cunningham and Eamage (1) 

 have taken this species in the Firth of Forth. They write as follows about 

 it : " Commonly found among Laminarian roots, also occasionally under 

 stones " (see also 5, p. 99). But also the new species which I formerly (5, p. 95) 

 thought I could establish from Heligoland in accordance with Michaelsen's 

 description (4, p. 39) is plainly identical with Nicomache maculata. 



Regeneration. — Howth : 1 anterior setigerous segment : 2 ; 2 anterior 

 ditto : 1 ; and 1 posterior ditto : 1 individual. Blaeksod Bay : 1 anterior 

 setigerous segment : 2 ; 8 posterior ditto : 1 individual. 



Leiochone sp. 



From Galway Bay, in the West of Ireland, or, more precisely. Station 

 A. 124 (7, p. 94), or S.W. of 2nd buoy of Margaretta Shoal, 18 m., comes an 

 individual, small, complete, but regenerated in both its anterior and its posterior 

 regions, which, so far as one can gather from the investigation of such scanty 

 material, approximates very closely to Leiochone polaris (Theel) (5, p. 150). 

 The purely Arctic distribution of the latter species, however, which is not 

 known even from the most northerly parts of Norway (5, p. 155), renders it 

 improbable that the present species is identical with the one mentioned. The 

 investigation of fuller material is the necessary preliminary to settling this 

 question. 



The individual in question, like Z. polaris, possesses 19 setigerous seg- 

 ments and probably 3 hinder achaetous segments. At any rate, two of the 

 last-named can distinctly be observed, and behind these there is room for one 

 more. The ventral anal cirrus is distinctly developed. The regenerated anterior 

 region embraces 3 setigerous segments and is 2 '4 mm. long ; the fourth to the 

 eighth setigerous segments are normally developed and measure 4'5 mm. ; the 

 regenerated posterior region measures 4 mm. in length. No ocelli can be 

 discerned, which of course does not preclude the possibility of their being 

 found in the fully developed head. The epidermal glands, on the whole, 

 resemble those in Z. polaris (5). The following divergences, however, have 

 been noticed. The stronger glands forwards on the fourth to the sixth seti- 

 gerous segments diminish more rapidly behind the parapodia, whereas the 

 more faintly coloured ones (cf. 5) in the hinder part of the segments are quite 

 close together, especially on the fourth setigerous segment, in the hinder part 

 of which they form a distinct band ; the seventh setigerous segment, on the other 



